Gearing



G. D. SUNDSTRAND Nov. "6, 1923.

GEARING Filed Jah. s1 1919 S'SheetS-Sheet 1 M M W N l A TTORI'JE VJ G.' D. SUNDSTRAND GEARING Nov; 6, 1923. mums Fil ed Jan. 31 1919 3 Sheets-Sheet 3 I INI/IEIVTOH G. U. 5&67264317'QZZQ TTOR/VEV WITNESS Patented Nov. 8, 1923.

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GUSTAF DAVID SUNDSTRAND, OF B,

MILLING- IVIACHI'NE COTEEPANY, OF

NOIS.

Application filed January 31, 1919.

T 0 all w from it may concern Be it known that I, Gris'rAr STRAND, a citizen of the ing in the city 1101s, have invented new i EAYEJlhh OCKFOBD, ILLINOIS, ASSIGNOR TO ROCKFORD ROCKFORD, ILLINOIS, A CORPORATION OF ILLI- GEARING.

Davin Sum) United States, residof Rockford and State ofIlliand useful Improvements in Gearing, of which the following is a specification.

The invention has reference to gearing for milling machines and t ject thereof is to provide an improved con-.

struction and arrangeme the controlling devices he like, and one obiit of the gearing and therefor wherein such devices are arranged in a very compact manner, present a. neat pearance, and operator.

and ornamental apare very convenient for the Another object of the invention is to provide, in combination gearing proved in either direction.

with change speed of advantageous construction, 1mmechanism for actuating the gearing Another object of the invention is to provide for changing the two shafts through a all in the same sense,

speed ratio between series of increments by sliding a set of gears on one of the shafts through a corresponding series of of adyustment.

predetermined positions The objects of the invention thus generally stated, together with other and ancillary advantages, are attained by the preferred construction and arrangement illustrated in the accompanying drawings, forming part hereof, in which Figure 1 is a fragmentary longitudinal portion of a milling ma features of my verse vertical section 1* 1g. 1. big.

sectional view of a chine embodying the invention. Fig. 2 is a transtaken on line 2-2 of 3 is a fragmentary horizontal section taken on line 3-'3 of Fig. 2. Fig. i

' .C is a iragmentary vertical section taken on line ll of each of Figs. 1 and 3. Fig. 5 is a fragmentary s de elevation showing the arrangement of the 6 is a fragmentary on line 6-6 of Fig. 2.

sectional view taken on controlling devices. Fig. horizontal section taken Fig. 7 is a vertical line 7-7 of Fig. 1.

Fig. 8 is a sectional view taken on line 8-8 of Fig. 1.

The frame of the machine in which the invention is embodied is indicated generally at 1.. and 2 indicates a cutterv spindle mounted in suitable bearings in the frame and driven,

through the medium 0 f gearing to be de- 16 (Fig. l), and fixed Serial No. 274,158.

the main drive shaft, while 5 indicates a tumbler shaft, which is driven from the drive shaft in a manner to be later set forth, and 6 indicates an intermediate shaft having gearing connections with both the tumbler shaft and the spindle or driven shaft whereby the latter is actuated.

The gearing connections between the driven shaft 2 and the intermediate shaft 6 comprise three gears 7, 8 and 9 of varying sizes on the driven shaft, and three gears 10, 11 and 12 fixed against rotation as well as sliding movement on the intermediate shaft 6. The gear 7 on the driven shaft is loosely mounted thereon and meshes at all times with the gear 10 on the shaft 6; and the gears 8 and 9 are slidably but non-rotatably mounted on the driven shaft 2. The gears 8 and 9 are thus movable into mesh with the gears 11 and 12 respectively on the shaft 6. In order that the driven shaft 2 may be actuated through the medium of the gears 7 and, 10, the gear 7 is arranged to be locked against rotation relative to the shaft 2 by the gear 8. For this purposethe adjacent faces of the gears 7 and8 are provided with suitable clutch devices which may comprise a series of pins 13 (Fig. 1), suitably mounted in the gear 7, and a corresponding number of openings 14 (Fig. 8) in the gear 8 for receiving the pins when the gear 8 is slid into engagement with the gear 7. When in this position, the gears 8 and 9 on the shaft 2 are out of mesh with the gears 11 and 12 on the shaft 6.

The tumbler shaft 5, which is constantly driven in one direction or the other in a manner to be later set forth. is journaled at its opposite ends in the walls of a tumbler 15. This tumbler is in the form of a casing pivotally mounted at its rear end on a shaft on said tumbler shaft 5 at spaced intervals are three gears 17 18 and 19 movable by swinging the tumbler, into mesh with two contiguous gears 20 and 21 slidably but non-rotatably mounted on the shaft 6. By spacing the tumbler gears 17, 18 and 19 apart sufficient to receive one of the gears 20 or 21 while the other meshes with one of said tumbler gears, it is possible,

shaft, the gear 48 serving to lock said gear 46 against rotation on the shaft 16 so that the tumbler gears may be driven through the gears 44-, 46 and 49. In order that the gears 46 and 48 may interlock they may be provided with clutch teeth 50 and 51 (Fig. 3), and for'the purpose of shifting the gear 48 a rotary device is provided comprising a crank rod 52 suitably mounted in the frame 1 and having a crank 53 on its inner end and a knurled head 54 on its outer end. The gear 48 has rigid therewith a hub 55 which is provided with a groove 56 in which the inner end of the crank pin of the crank 53 is adapted to operate to effect a shifting of the gear 48 when the knurled head 54 is rotated.

It will be seen that I have provided change speed gearing which is capable of transmit- .rng power from a drive shaft to a driven shaft at a great variety of speeds and in either direction, and that the gearing i so combined with the shifting or controlling devices as to enable an advantageous arrangeent of the latter. By mounting two gears on the shaft 6 so as to be shiftable with reference to the tumbler gears, the necessity for sliding the tumbler, as is the case in some prior devices, is eliminated. Hence it is possible to greatly simplify and strengthen the tumbler and the means for swinging it. Moreover the arrangement of the shaft 6 between the driven shaft 2 and the tumbler enables the advantageous arrangement of the gear-shifting devices 22, 23, and 24 above set forth.

It will also be noted that in the construction and arrangement of the gearing et forth, the tumbler 15 is made to support both ends of the tumbler shaft 5, it being evident that inasmuch as the tumbler is not slid endwise there is no danger of the bearings for the shaft interfering with any of the gear-shifting operations.

In Fig. 1, the drive shaft 3 is shown as provided on its inner end with a gear 5? meshing with a gear 58 to actuate a gear 59. fhese gears are a part of the feed mecha nism forming no part of this invention.

While I have described one embodiment of my invention as illustrated in the drawings, it is to be understood that I do not desire to be limited to this particular embodiment of the principles and features disclosed throughout the description. My invention broadly considered and expressed in the appended claims is to be limited only by he prior art.

I claim as my invention:

1. The combination of a pair of shafts, means adapted to connect said shafts so that one shaft may be driven from the other at a variety of speeds, a pivotally mounted tumbler having a. shaft with a plurality of gears thereon of different sizes, a plurality of gears on one of said pair of shafts slidable into and out of position to be operatively engaged by the gears in said tumbler, means for drivin the tumbler shaft, means for sliding said .slidable gears, and means for swinging said tumbler.

2. The combination of a shaft having a plurality of gears slidably but non-rotatably mounted thereon, a pivotally mounted tunr hler having shaft with a plurality of gears fixed thereon, means for driving the tumbler shaft, and means for swinging said tumbier to carry its gears into mesh with the first mentioned gears, said tumbler gears being spaced apart so that when one of the first mentioned gears is brought into mesh we one of the tumbler gears the remainder of the first mentioned gears may enter th space between two of the tumbler gears- 3. In a machine of the class referred to, drive shaft, a driven shaft, and means adapted to connect said two shafts whereby the one shaft may be driven by the other at a plurality of different speeds, said means includ ing a shaft adapted to be connected with the drive shaft for rotation thereby, a lumbl: pivotally mounted on the last men shaft and having a plurality of gears mounted therein, and a shaft between said tumble-r and the driven shaft operativcly connected with the driven shaft and having a plurality of gears thereon slidable into and out of position for engagement by each of the tumbler gears.

4. In a machine of the class referred to, a drive shaft, a driven shaft, and means adapted to connect said two shafts whereby one shaft may be driven by the oth in either direction at a plurality of diffe speeds, said means including a third shaft having a gear loosely mounted thereon, gear on the drive shaft meshing at all times with said loose gear, a tumbler or said third shaft havinga shaft ti. ein a h ed be operatively connected w itn the driven shaft, a fourth shaft. selectively connected at various speed ratios with the drive shaft and having a gear fixed thereon, and. a gear on said third shaft adapted to in h with the gear on the fourth shaft and movable into interlocking engagement with the loose gear on the third shaft to hold it rotation thereon.

5. The combination of a pair of shafts, means adapted to form various operative connectio is between said shafts whereby one shaft may be driven from the other at a plurality of different speeds, a third shaft. a tumbler pivotally mounted on said third shaft and having a shaft therein opcrativ iy connected with said third shaft, means for driving said third shaft in either direction, and means independent of said means for connecting said pair of shafts, including a plurality of on said tumbler shaft adapted to operatively Connect said tumbler shaf to. driveone of said pair of shafts at a variety of speeds. V

6. In a machine of the class referred to, a shaft to be driven, a tumbler pivotally mounted at one end and having a shaft therein, an intermediate shaft, gears loneach of said shafts movable into variousposit-ions' of adjustment to effect a variation in speed of the driven shaft, a rotary device "for slidmg the gears on the driven shaft, a rotary device for swlnglng the tumbler and the 'gearstherein, and a device disposed between the rotary devices and movable substantially rectilinearly to slide the gears on the "intermediate shaft. i 1

' 7 In a machine of the class referred to,

pair of shaftsaind an'intermediate'shaft, gears on each of said shafts movable into first mentioned gears. g I

10. ln'a variable speed power transmis slon, a driven shaft, an intermediate shaft various positions of adjustment to obtain a a pair of shafts and an intermediate shaft, gears on each of said shafts movable into various positions of adjustment to effect a variation in'speed ofone of said shafts, rotary devices for moving the gears on said pair of shafts, and a device for moving the gears on said intermediate shaft disposed between said rotary devices and movable in a path substantially at right angles to a line connecting the axes of said rotary devices.

' 9. The combination of a' shaft having a plurality of gears slidably but non-rotatably mounted thereon, a tumbler pivotally b t-1t non-slidably mounted von an axis parallel to said shaft, a shaft mounted in the tumbler and having a plurality of gearsfiXedthere- .on, and devices for sliding thef first mentioned gears and swinging said tumbler whereby any one of the tumbler gears may be brought intomesh with any one of the parallel to said driven'shaft, a tumbler shaft extending parallel toa portion of the length .of said intermediate shaft-only, slidable gears on the portion of said intermediate shaft adjacent said tumbler shaft adapted to.

be driven from'saidtumbler, and fixed gears on the other portion of said intermediate shaft adapted to drive said driven shaft.

11. In a-variable speed transmission, a pair of shafts, a plurality of fixed gears and a plurality of slidable gears on the first shaft, a plurality of driven gears on the second shaft adapted for selective engageand other coaxial gears of various sizes adapted to be moved intoseleetiive engagement with said slidable shaft. v

.12. In adevice for transmittingpower at a plurality of speed ratios, a rotary control gears of the first element adapted to shift gears "axially into mesh with other gears, a secondl slidable" control element adapted to shift other gears sliding them, the axes of said three control elements being parallel, and power-transmitting mechanismbetween said first and third control elements and the gears conment with the fixed gearsof the first shaft, I

axially, a third, rotary control element adapted to move .gears into mesh w1thout trolled thereby including mechanism for multiplying the manualforce upplied' 7 13. In a variable speed mechanlsnnf a speed-setting dial, compris ng three control elements adjustable in planes parallel to'the dial, the first control element having rotary adjustability and having means adapted to shift gears axially into mesh with other gears, the second control element'having rotary adjustability and being providedwith rack and pinion means whereby easily to swing tumbler gears into .mesh with othergears,

and the third control elementhaving linear- 'adjustability substantially at right angles to the line of centers of the first and second control elements and having means adapted to shift ax ally the gears whichmesh With thetumbler gears,'the first control element acting independently of the other control.

elements. V

, 14,-. In a variable. speed power trans missioma shaft, a pair of gears of different diameters splined on said shaft, a plurality of gears of different diameters separated by spaces not less than the widthvof the larger.

splined gear, means for sliding saidsplined gears, and means for swinging said spaced gears into mesh with said splined gears.

r11 2. variable speed power transmission, a tumbler a shaft I pivoted in said tumblercarrying a plurality of'gears 'a shaft pivotally supporting said tumbler, a

gear on said last mentioned shaft continually meshing with one of saidtumbler gears,

another gear sphned on said. last mentioned 1 shaft, andsa third "gear loose en -said last mentioned 7 shaft, means for drivinggsaid splined and loose gears. in opposite directi0ns,'said splined gear and said'loose gear having cooperatingclutch elements, and

means for moving said splined gear out of engagement w th its driving means and into engagement with said loose gear. I

16. In a power transmission, a drive shaft, continuously rotating in one directron, a drivenshaft and a countershaft,-sa1d drive shaft havinga gear meshing wlt-h a gearloose on the driven shaft and with a gear rigid on the .countershaft, said countershaft having a gear meshing with the slidable gear on the driven shaft, said slidable gear and loose gear having cooperating clutch elements, whereby the slidable gear engages the loose gear when out of mesh with'the second gear of the countershaft.

17. A variable speed power transmi sion, comprising three sets of rotary elements, control means for moving the first set of elements out of operative enga ement with the second set, control mean for pcsitioning the second set of elements to receive the first set in engagement for power transmission at a plurality of difierent speed ratios, and control means for positioning the third set to receive power from the second set at a plurality of different speed ratios, the control means for said first and third sets including mechanism for increasing the manual for e applied.

18. A variable speed power transmission, having, in combination, three sets of rotary elements, means for withdrawing the first set of elements from operative engagement with the second set, means for positioning idle elements in said second set to receive elements of said first set for transmitting power at a relatively large number of variou speed ratios, and means for positioning elements of the third set to receive power from elements of the second set at a relatively small number of various speed ratios,

said means for withdrawing the first set of elements operating independently of the position of the elements of the second set.

19. A variable speed power transmission having, in combination, three sets of rotary elements, the intermediate set including slidable elements adapted to receive power from the first set, and the third set including slidable elements adapted to receive power from the said intermediate set, means for withdrawing the first set of elements from operative engagement with the slidable elements of the second set, means including mechanism for increasing the manual force applied for sliding the slidable elements of the third set, and means for sliding the slidable elements of the second set.

20. A variable speed power transmission having, in combination, three pairs of four parallel shafts, one being a tumbler pair comprising a tumbler shaft and a pivot shaft and control means for swinging the tumbler shaft about the pivot shaft, each pair comprising a driving shaft and a driven shaft, the driven shaft of each pair being the driving shaft of the next pair, the tumbler pair having a rigid driving gear and a rigid driven gear, the remaining pairs having spaced driving gears rigid to the shaft and contiguous driven gears slidablo on the shaft, and having control means for liding said driven gears, whereby selective engagement of gears within obtained.

21. in a machine of the class referred to, an intermediate shaft and a final shaft,flxed gears on said said intermediate shaft, and means carried by said final shaft for connecting it to said intermediate shaft at any one of a plurality of different speed ratios, gears on said intermediate shaft slidable into any one of a series of predetermined positions, and adjustable gears for driving said slidable gears at a predetermined speed in each position of adjustment, the speeds corresponding to the different positions of adjustment increasing uninterruptedly throughout the series.

22. In variable speed transmission, a pair of shafts comprising a driving shaft and a driven shaft, the driving shaft having a plurality of spaced gears fixed to its shaft, a driven shaft having contiguous driven gears slidable on the shaft, and means for producing the meshing of any one driven gear with any one driving gear, the pitch diameters of said driven gears having a ratio nearer unity than that of the pitch diameters of any two adjacent driving gears.

23. In a variable speed transmission, a shaft, two contiguous gears of different diameters splined on said shaft, a plurality of gears of dififerent diameters, each of said last mentioned gears spaced from each adjacent gear by a space not less than the width of the larger splined gear, the pitch diameters of said spaced gears increasing uninterruptedly throughout the series, the ratio between the pitch diameters of the splined gears differing from unity by an amount less than the ratio between the pitch diameters of any two adjacent spaced gears, and means for producing the meshing of any one of said sphned gears with any one of said spaced gears, whereby said splined gears may in their various positions of adjustment be driven at a series of different speeds increasing uninterruptedly throughout the series.

24. A variable speed power transmission having, in combination, a driving shaft and a driven shaft, a set of gears on each shaft, means for moving one shaft toward and away from the other to bring the gears into and out of mesh, and means for sliding one set of gears to associate any gear in the slidable set with any gear in the other set, the

pitch diameters of the gears being such that an uninterrupted series of speed increments in the same sense, corresponding to the linear series of positions of adjustment of the slidahle gears, is provided for the driven shaft.

25. In a variable speed transmission, a shaft, gears of different diameters splined on said shaft, others gears of different diameters the ratio between the pitch CiiQJYb' eters of ad aeent sphned gears differing from unity by an amount less than the ratio between the pitch diameters oi": any twoadjacent other gears, and means for producing the meshing of any one of said splined gears with any one of said other gears.

26. In a variable speed transmission, a pair of shafts, twogears of different dia1netei's spiined onthefirst shaft, a plurality of gears of different diameters, on the second shaft the pitch diameters of said last .nientioned gears'increasing uninterruptedly throughout the series, the ratio between the producing the meshing of one of said splined gears with any one of saidrother gears, whereby-said splinedgearsmay in their various, positions or adjustment be driven at a' series of different speeds inereas ng uninter-rupt-ediy throughout the 'ser1es;':

have hereunto in testimonywhereof, I set myh'and:

GUsTAF D VID" sUN sTRANn- Gertificate of Correction.

It is hereby certified that in Letters Patent No. 1, 17 3,166, granted November 6, 1923, upon the application of Gustav David Sundst'rand, of Rockford, Illinois, for an improvement in Gearing, errors appear in the printed specification requiring correction as follows: Page 3, line 94, claim 3, for the Word operatively read selectioely, and after the word connected insert the Words at various speed ratios, same page, line 110, claim 1, for the Word selectively read operaiwely;

same page and claim, lines 110 and 111, strike out the Words at various speed ratios; and that the said Letters Patent should be read With these corrections therein that the same may conform to the record of the casein the Patent Oflice.

Signed and sealed this 18th day of December, A. D., 1923.

[smu] KARL FENNING,

Acting Uom-mz'ssioner of Patents. 

